<template>
    <div id="root">
        <div class="todo-container">
            <div class="todo-wrap">
                <myHeader :addTodo="addTodo" />
                <myList :todos="todos" :checkTodo="checkTodo" :deleteTodo="deleteTodo" />
                <myFooter :todos="todos" :checkAllTodo="checkAllTodo" :clearAllTodo="clearAllTodo" />
            </div>
        </div>
    </div>
 
</template>
<script>
import myHeader from './SOM/myHeader.vue';
import myFooter from './SOM/myFooter.vue';
import myList from './SOM/myList.vue';
export default {
    name: 'App',
    components: {
        myHeader,
        myList,
        myFooter
    },
    data() {
        return {
            todos: [
                { id: '001', title: '学习python框架', done: false },
                { id: '002', title: 'vue知识点回顾', done: false },
                { id: '003', title: '英语PPT制作', done: false },
            ]
        }
    },
    methods: {
        //添加一个todo
        addTodo(todoObj) {
            this.todos.unshift(todoObj)
        },
        //勾选or取消勾选一个todo
        checkTodo(id) {
            this.todos.forEach((todo) => {
                if (todo.id === id) todo.done = !todo.done
            })
        },
        //删除一个todo
        deleteTodo(id) {
            this.todos = this.todos.filter(todo => todo.id !== id)
        },
        //全选or取消勾选
        checkAllTodo(done) {
            this.todos.forEach(todo => todo.done = done)
        },
        //删除已完成的todo
        clearAllTodo() {
            this.todos = this.todos.filter(todo => !todo.done)
        }
    }
}
 
</script>
<style>
body {
    background: #fff;
}
 
.btn {
    display: inline-block;
    padding: 4px 12px;
    margin-bottom: 0;
    font-size: 14px;
    line-height: 20px;
    text-align: center;
    vertical-align: middle;
    cursor: pointer;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
    border-radius: 4px;
}
 
.btn-danger {
    color: #fff;
    background-color: #da4f49;
    border: 1px solid #bd362f;
}
 
.btn-danger:hover {
    color: #fff;
    background-color: #bd362f;
}
 
.btn:focus {
    outline: none;
}
 
.todo-container {
    width: 600px;
    margin: 0 auto;
}
 
.todo-container .todo-wrap {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
}
</style>